EP 2607948 A1 20130626 - BACKLIGHT MODULE DRIVEN BY ALTERNATE BACKLIGHT AND LIQUID CRYSTAL DISPLAY
Title (en)
BACKLIGHT MODULE DRIVEN BY ALTERNATE BACKLIGHT AND LIQUID CRYSTAL DISPLAY
Title (de)
MIT EINER WECHSELNDEN HINTERGRUNDBELEUCHTUNG BETRIEBENES HINTERGRUNDBELEUCHTUNGSMODUL UND FLÜSSIGKRISTALLANZEIGE
Title (fr)
MODULE DE RÉTROÉCLAIRAGE PILOTÉ PAR UN RÉTROÉCLAIRAGE ALTERNÉ, ET AFFICHEUR À CRISTAUX LIQUIDES
Publication
Application
Priority
- CN 201010260273 A 20100817
- CN 2010076814 W 20100910
Abstract (en)
The present invention discloses a backlight module (10, 20) and a liquid crystal display (LCD) (20, 60) having the backlight module (10, 20), which drives light emitting diodes (LEDs) alternately. The present invention utilizes two inverters (26, 28) to individually drive two sets of LEDs (22, 24) alternately. During the same switching period, the two sets of LEDs (22, 24) alternately turn on/off; that is, the two set of LEDs (22, 24) are respectively off in a duty cycle of 50 percent. Since each set of the LEDs (22, 24) is off in half of the switching period, the backlight module (10, 20) and the liquid crystal display (LCD) can prevent over high temperature and reduce heat effectively during lighting the LEDs (22, 24).
IPC 8 full level
G02F 1/13357 (2006.01); G09G 3/34 (2006.01); H05B 37/02 (2006.01); G02F 1/1335 (2006.01); H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
G02F 1/133603 (2013.01 - EP US); G09G 3/3406 (2013.01 - EP US); H05B 45/3725 (2020.01 - EP US); G02F 1/133612 (2021.01 - EP US); G02F 1/133613 (2021.01 - EP US); G02F 1/133628 (2021.01 - EP US); G09G 2330/025 (2013.01 - EP US); H05B 45/38 (2020.01 - EP US); Y02B 20/30 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
US 2012044268 A1 20120223; CN 101923841 A 20101222; CN 101923841 B 20120530; EP 2607948 A1 20130626; EP 2607948 A4 20170503; WO 2012022054 A1 20120223
DOCDB simple family (application)
US 99632210 A 20100910; CN 2010076814 W 20100910; CN 201010260273 A 20100817; EP 10856052 A 20100910